Gree GMV-335WL/C1-X

DC Inverter Multi VRF System
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(2) Direct the flared part of copper pipe to the center of screwed joint. Twist on the flared nut
tightly by hand, as in Fig.4.11 (Make sure indoor pipe is correctly connected. Improper
location of the center will prevent flared nut from being securely twisted. Thread of nut will
get damaged if the flared nut is twisted forcibly).
(3) Use torque wrench to twist on the flared nut tightly until the wrench gives out a click sound
(Hold the handle of wrench and make it at right angle to the pipe. as in Fig.4.12).
(4) Use sponge to wrap the un-insulated connection pipe and joint. Then tie the sponge tightly
with plastic tape.
(5) Connection pipe should be supported by a bearer rather than the unit.
(6) The bending angle of piping should not be too small; otherwise the piping might have cracks.
Please use a pipe bender to bend the pipe.
(7) When connecting IDU with connection pipe, do not pull the big and small joints of IDU with
force in case the capillary tube or other tubes have cracks and cause leakage.
Fig.4.11 Fig.4.12
Pipe diameter Tightening torque
Φ6.35mm
15~30(N·m)
Φ9.52mm
35~40(N·m)
Φ12.7mm
45~50(N·m)
Φ15.9mm
60~65(N·m)
4.3.5 Outdoor Pipe Connection
During engineering installation, the connection pipe inside the unit must be wrapped by insulation
sleeve.
(1) Pipe connection for GMV-H224WL/A-X, GMV-224WL/C-X: As shown in Fig.4.13 and
Fig.4.14, open the outermost soundproof cotton and place a fire barrier between
compressor and straight pipe. Use a soldering gun to unsolder straight pipe 1 and straight
pipe 2. Install connection pipe 1 and connection pipe 2 to the corresponding position and
then seal the apertures with welding rod. First weld the liquid side connection pipe and then
weld the gas side connection pipe. During welding, it’s necessary to use wet gauze to wrap
up the two cut-off valves. Make sure the flame won’t burn the soundproof cotton or other
components.